Same thing is happing on mine. This is my second unit with the exact same specs...
MacBook Pro i9 2.6 6-core w/ Radeon Pro Vega 20 with 4GB of HBM2 memory TWO DAYS OLD - MACBOOK PRO SCREEN FLICKERS WHEN CONNECTED SINGLE EXTERNAL DISPLAY VIA USB-C TO HDMI This is my second unit. The first unit with the same specs was returned by me on December 17, 2018 for the same issue with the screen flickering when hooked up an external display. Decided to try it again so reordered the same model. As you can see it also flickers. I've tried everything including different external displays, and the MacBook Pro flickers regardless of type.
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It’s not a bad flicker and it’s not coming from the screen but from the software. It’s totally normal.
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Yeah, that still shouldn't be happening. I hope that it doesn't indicate an issue with the Vega 20 card on your machine. Like you said, at least you have until January 8 to find out.
I bought two identical i9 Vega 20 32gb Macbook pros in the last month and both of them have screen flickering issues...
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^You mean hardware acceleration? I don't think that's the problem here. But even if it is, disabling hardware acceleration causes other problems, so I don't think would be an acceptable compromise.
I had flickering even when I wasn't using Chrome. I often only used Safari and yet I'd still see flickering.
I use Firefox, have for years and I can confirm the issue isn't limited to Google Chrome, or the type of USB-C adapter you are using, or the brand of external monitor, or the circuity in your house and appliances drawing too much current away from the power adapter connected to your Macbook. None of these are the problem.
I initially thought it might have something to do with the inverter.
Apple Support insofar has been useless...
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That is very wise and the best thing to do in this situation. It could very well be a hardware defect; you won’t know for sure unless it’s fixed by software. Even if you get a brand new replacement from Apple I’m not sure if it resets your return window (can anyone confirm?). For this reason I’m more comfortable just processing a return and then buying again completely separately to get a new replacement window.
Your configuration is insanely expensive for a laptop (albeit a high-end one) and it should work as expected out of the box. Whatever you do, don’t accept any delaying tactics from Apple. They may very well try to instigate a software support process which is both time consuming and annoying.
As a warning to anyone else that might experience an issue like this on a new product my advice is to politely but firmly say you’re not interested in a support process for a brand new product that doesn’t meet your reasonable expectations (such as a non-flickering display). If Apple can’t supply a hardware and software package that is free from problems they should accept it back and work on their QA/QC, not expect the customer to be inconvenienced by a drawn-out support process and having to endure a brand new computer they paid good money for that has issues. Of course no QA/QC process can guarantee a 100% problem-free shipping inventory, but the end result for the customer is the same: just don’t accept flawed, broken or problematic products!
Even though the throttling issue was ultimately fixed with software (and this could be too), that would’ve been reason enough to return it before the issue was fixed in my opinion because affected units weren’t performing to spec. Funny how quickly Apple got onto that one given how widespread the problem was.
I did a full-blown exchange after waiting for a refund on the old one that flickered. I then ordered an i9 Vega 20 with the exact specs. The new one also has issues with the screen flickering (see video).
